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The Market Structure of Vincas

Lowell Halvorson

Vinca series often deploy as fraternal twins, upright and spreading. Think Cora/Cora Cascade and Titan/Mediterranean. They emerge from the same breeding teams with the same philosophies, so they’re often lumped together in discussions.

Trailing vincas work well in baskets, but they also knit together into a solid bed, covering the soil. Vincas in baskets also received a boost from the Impatiens Downy Mildew crisis about a decade ago. I never saw vinca baskets back then because Super Elfin did the job so well. These days, a vinca basket has the impatiens look, just as many colors and the carry-through for high summer. Super Elfin got shelved.

Today’s vinca sales are driven by two primary forces: commercial plantings and southern work. It’s the nature of vinca’s impatiens-like flowers to be tied to the larger impatiens market. Seen as the full sun/hot weather work-alike, vinca operates on the fringes. It has to wait for the soil to warm up so it’s the last of the major spring crops to ship. That’s a northern point of view.

Southern thinking reverses this pattern. Vinca is the default because “the hotter, the better.” Landscapers plant in most months and for them the color range is good enough. Vincas are tough, durable, and low-maintenance*. Impatiens is the work-alike that’s deployed around the edges when vinca won’t do, like in heavier shade or colder months.

Cora & Cora Cascade XDR

The asterisk* in the ointment is Phytophthora, a fungal-like disease that spreads in wet, hot places like the U.S. Gulf States. More tornado than sustained hurricane, its virulence is tied to the local conditions. It fires up hot spots and destroys a lot of small areas intensely.

This is the nut XDR cracks. Cora/Cora Cascade builds “eXtreme Disease Resistance” by collecting many strains, then integrating improvements into its colors through a rolling cycle of high-count inoculation trials to stay ahead of the disease pressure. The series has earned a reputation for having the best Phytophthora resistance in the business and many Southern landscapers use nothing else. Once bitten, twice Cora XDR.

Titan, Titan-ium & Mediterranean

That quirky hot spot nature of Phytophthora also explains why Titans and their kin can ship mountains of seed annually. Large chunks of the country—to the north, west and even in some southern places—don’t need extreme disease resistance. Titans have the natural vigor of F1 hybrids, bringing a strategy of extra healthy to disease resistance. In essence, it can outfight attacks and outgrow the damage, especially if the spore density isn’t that bad.

Titan’s commercial success comes from its broad color range, tight blooming window and even habit. It’s consistent to the extreme. Cora walked back from this bar in exchange for that extra XDR protection; Titan walked back from extreme disease resistance to get better color selection.

No series is complete, however. A common industry habit is to base the bulk of a vinca program on one series, then poach the missing colors from another series. This habit encourages the Coke/Pepsi reputation of Cora and Titan. They look awfully similar, but differences do exist.

Article ImagePictured 1. Draping vincas work well in both baskets and beds. Their trailing ends knit togther to create a seamless mass of color. 2. A vinca series tweaked for issues that northern growers face. The series has a really good blue. 3. The XDR moniker is important for southern landscapers. It's found on the Cora and Cora Cascade series.

This April, Titan-ium (with the hyphen) launched as an upgraded version of Titan, starting with seven colors. Running through a core inoculation program of its own, Titan will migrate into Titan-ium over the next half decade or so. During the transition, the two series will exist side-by-side. You can swap them out interchangeably because they have the same habits and protocols.

Blockbuster—The northern vinca

A competing F1 hybrid is the Blockbuster series, optimized for suboptimal growing conditions found in the north. Early season sowing is necessary to meet early summer sales, but the schedule pushes starts into less-than-ideal shorter days and darker skies. Heat is expensive, so if you have to pump it, you want strong results for the money you spend.

As an F1 hybrid, Blockbuster brings better germination rates than open-pollinated varieties. An interesting color note here is Blockbuster Blue, one of the strongest blues I’ve seen in a vinca. Blockbuster's Red, Red with Eye and Dark Red are also highly regarded.

Open-pollinated series

Open-pollinated series like SunStorm, Pacifica and Victory function as the economy model vincas. They cut costs by working directly with the bees rather than leaning on hand pollination to control for unwanted crosses. This results in a good standard vinca, but without the enhancements of XDR, the color range of Titan or any Suntory fancifulness. These series are built for pack production where high volume and/or low cost controls the purchase order.

The décor series

This past decade has seen the rise of the décor vincas, led by Suntory. Southern Japan is just as hot and humid as the American Deep South, but the Japanese brought a different sensibility to the vinca game.

■ Soiree Kawaii: Small blossoms with heavy color coverage over the top. This is the same strategy taken by violas to generate a carpet of color with very little green peeking through. It’s very good as filler in a container.

■ Soiree Flamenco: Showy, fancy peacock-style blossoms. Generally bigger blooms are filled with ruffles, swirling colors or sometimes both.

■ Soiree Doubles: The classic doubling of petals. Blooms all sit vertically on the stem.

Japanese breeders aren’t the only ones bringing showy stuff to the market. In the Tattoo series from PanAmerican, saturated colors have dark centers. Tattoo Black Cherry is particularly striking, with staining that swirls outward to the petal edges.

Another series, Nirvana, is made up of interesting characters. These are Cora colors that didn’t pass their seed purity tests, but the individual plants work very well in the URC market. They feature designer colors not normally associated with vinca, like Nirvana Blackberry and Nirvana Cascade Pink Splash. GT

Correction: Fleming Brothers worked out of Lincoln, Nebraska, not Oklahoma as I stated in my GrowerTalks column on dark leaf hibiscus, February 2024.

Lowell Halvorson is a consultant and writer in Fairfield, Connecticut, for retail and wholesale horticulture, specializing in business development. He also covers the breeding community for GrowerTalks magazine. You can contact him at (203) 257-9345 or

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